what psi should my pool filter be at


Author: Poolking - Swimming Pool Equipment Manufacturer

What PSI Should My Pool Filter Be At?

Summer is here, and it's time to make sure your pool is up and running in top condition. One thing every pool owner should be aware of is the importance of maintaining their pool's filter pressure. The pressure within your filter plays a vital role in keeping your water clean and free of debris. If you're not sure what PSI (pressure per square inch) your pool filter should be at, then keep reading!

Why is pool filter pressure important?

Your pool filter is responsible for removing dirt, leaves, and other debris from your pool water. Over time, the filter will become clogged with this debris and will need to be cleaned. If the pressure within your filter is too low, it may be a sign that your filter needs backwashing (a process where water flows through the filter in reverse, flushing out debris). On the other hand, if the pressure is too high, it could indicate a blockage somewhere in your system, which could lead to even bigger problems down the line.

What is the normal PSI range for a pool filter?

The ideal PSI range for your pool filter depends on the type of filter you have. Most filter manufacturers will provide a recommended PSI range in the owner's manual. However, as a general rule of thumb, a clean filter should operate anywhere between 10-25 PSI. If your pressure is outside of that range, it's time to take action.

What causes high or low filter pressure?

Various factors can affect the pressure within your pool filter. The most common are:

1. Dirty filter: Over time, your filter will get clogged with debris, which reduces the flow of water through the system.

2. Broken valve: If the valve that sends water to your pool filter is broken, it could cause issues with water flow and pressure.

3. Closed valve: If a valve that should be open is closed or partially closed, it could lead to reduced water flow and increased pressure.

4. Water chemistry: Poor water chemistry can cause excessive growth of algae or other microorganisms, which could clog your filter.

What should I do if my filter pressure is too high or too low?

If your filter pressure is too low, you should start by checking the filter for any visible signs of debris. If it's dirty, then you need to clean it. If that doesn't help, you may need to adjust the valve settings or consult a professional.

If your filter pressure is too high, the first step is to check the pressure gauge to make sure it's accurate. If it is, then it's likely that there's a blockage in your system. Check your pump and plumbing lines for any obstructions. If you can't find anything, consult a professional.

How often should I check my filter pressure?

It's a good idea to check your pool filter pressure at least once a week during peak swimming season. If you notice a sudden change in pressure, it's time to investigate the problem. Don't wait until your next scheduled maintenance check to take action.


Maintaining the proper PSI within your pool filter is essential for keeping your pool clean and safe to swim in. Always follow the manufacturer's recommendations for your specific filter type, and check your pressure gauge regularly. If you're not comfortable troubleshooting any problems with your filter pressure, be sure to seek out the help of a professional.


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